Pilot-Scale Modified Anaerobic Baffled Reaction (MABR) in Treatment of Sewage

A pilot-scale modified anerobic baffled reactor (opposite folded plate anaerobic reactor) was designed and applied it to treat low concentration sewage by our research group. All the trials lasted 12 months, the results indicated that the start-up phase lasted 55 days and the optimal HRT was 6h. At this HRT with temperature 25 plusmn 2degC, the COD, TP and TN removal rates were 78.58%, 35.15%, 39.17%, respectively. Furthermore, the optimal anaerobic section rate was 45% ~ 65%, while the optimal influent COD concentration was 150 ~ 800 mg/L. sludge retention time (SRT) would be controlled under 105 days. When the temperature decreased to (7 plusmn 1)degC and the HRT was given as 6 h, the removal rates of COD, TP and TN were 64.37%, 20.72%, 23.65% respectively. The performance of trials indicated that the application of this proposed MABR to treat low concentration sewage is feasible at low temperature in North China. According to the results of trials, the efficiency of MABR in treatment of low concentration sewage could be owed to high efficient mass-transfer and two-double integrated staged multiphase anaerobe (TSMPA).